Asymmetric Synthesis of α-Amino Allyl, Benzyl, and Propargyl Silanes by Metalation and Rearrangement
作者:Scott McN. Sieburth、Heather K. O'Hare、Jiayi Xu、Yanping Chen、Guodong Liu
DOI:10.1021/ol034397y
日期:2003.5.1
nitrogen results in migration of the silicon from nitrogen to carbon (reverse aza-Brook rearrangement), yielding an alpha-amino silane. The Boc group acts initially as a metalation-directing group and then to stabilize the nitrogen anion, providing a driving force for the rearrangement. In the presence of (-)-sparteine, the new chiral center is formed in >90% ee from allyl, benzyl, and propargylamines